William henry laidler and thomas laidler



(No Model.)

W. H. & T. LAIDLER. WIRE ROPE 0R GABLE.

Patented Feb. 5, 1889 WITNESSES. $3M. @WW

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ATENT \VILLIAM HENRY LAIDLER AND THOMAS LAIDLER, OF l\lELl.)ON I IOUSE, N0. 9 LEOPOLD SJREET, BURIHE'IT ROAD, llOlV, (,OUNTY ()F MIDDLESEX,

ENGLAND.

WIRE ROPE. OR CABLE.

SPECIFICATION forming part of Letters Patent No. 397,371, dated February 5, 1889.

Application filed December 9,1886. Serial No. 221,082. (No model.) Patented in England May 9, 1885, No. 5,755; in Belgium June 11, 1886, No. 73,457, and in France September 6, 1886,N0.178,359.

To all whom it may concern:

Be it known that we,WILL1nM Hnrinv LAID- LER, engineer, manager of rope-works, and THOMAS LAIDLER, engineer, both of Meldon House, No. 9 Leopold Street, Burdett ltoad, How, in the county of Middlesex, England, subjects of the Queen of Great Britain, have invented certain new and useful Improvements in ire Hopes and Cables, (for which we have obtained Letters Patent in Great Britain, No. 5,755, dated May 9, 1885; in Belgium, No. 73,457, dated J une 11, 1886, and in France, No. 178,359, dated September 6, 1886,) of which the following is a specification.

This invention relates to a wire strand, rope, or cable in which the wires composing the strand, rope, or cable are in the form of sec tors or truncated sectors of a circle, whereby they constitute a continuous arch, imparting great strength to resist compression, torsion, and tension, and whereby the arc-shaped outer surfaces of the wires, forming the circumference of. the strand, rope, or cable, constitute a true continuous circle, or nearly so, presenting a smooth wearing-surface.

Figure of the accompanying drawings isa diagram illustrating the method of laying oil": the sectors for a strand composed of twelve sectoral wires, the inner circle of the diagram representing the arcs of the sectors of the wires and the outer circumference of the strand to be formed. Fig. 2 is a side elevation of a strand composed of twelve twisted sectoral wires. Fig. is an end view of a rope or cable composed of several strands, each strand being composed of sectoral wires. Fig. 4: is a diagram illustrating the method of laying off the sectors for a tubular strand composed of truncated sectoral wires, the innermost circle representing the truncated ends of the sectors and the intermediate circle representin the arcs of the sectors, which constitute the circumference of the strand to be formed, the strand in this case comprising eighteen sectoral wires. Fig. 5 is a side clevation of a strand composed of eighteen scctoral wlres as laid off in the diagram, Fig. .4. Fig. 6 is a side elevation of a strand composed of twisted sectoral wires and provided with a screw-thread. at one end. Fig. 7 is an end elevation of a tubular strand composed of sectoral wires provided with a core and with a nut.

Similar letters of reference indicate corre- SPOlltllllg parts in the different figures.

A strand or rope, A, constructed in accordance with this invention, comprises anumber of twisted sectoral wires, a, each of which is drawn or made in the form of a sector of a circle, the radial sides of the wires abutting and forming a continuous circular arclnwherebythe strand or rope is adapted to resist compression, tension, and torsion, and the arcshaped outer surfaces of the wires constitutin g the circiunterence of the strand or rope, forming a smooth wearing-surface devoid of the spiral ridges or corrugations existing in strands or ropes composed of round wires. These sectoral wires may severally constitute full sectors of a circle, or they may be truncated at their inner edges. If full sectors, the wires will form a solid strand or rope, as illustrated in Figs. 1 and 3; it truncated sectors, the wires will form a tulnilar strand, as illustrated in Fig. -l. The sectoral wires are laid or twisted spirally into a strand or rope on any ordinary rope-mac]line. The sectoral wires exten d imvard to or a1.)proXi1nately to the center of the strand, rope, or cable, and consti tute the body thereof.

The solid sectoral wires form a comparatively rigid strand or rope, and the truncated sectoral wires form a strand or rope of comparative flexibility, the flexibility being more or less according to the degree of truncation of the sectoral wires. The flexibility also varies with the number of wires, being in inverse proportion thereto.

Tension on the strand or rope con'lposed of these twisted sectoral wires tends to draw the wires toward the center and press them in solid contact, the wires su iporting one an other on their radial sides and affording resistance nearly equal to that of a solid rod, and when released from strain the rope becomes flexible.

The tubular ropes may be employed for the reception and protection of the conductingcores of telegraph-cables.

The strand or rope A may be formed with a screw-thread, as c, Fig. (i, to which a nut, 13, may be applied for attaching a coupling or a guide, or for any other purpose.

Several of the strands or ropes A may be twisted into a larger rope, C, as shown in Fig. 3.

1. A wire strand, rope, or cable the body of which is composed of a number of twisted seetoral wires disposed around a common center with their radial faces abutting, said. sectoral wires extending inward approximately to the center of the strand, rope, or cable, substantially as described.

2. A wire strand,rope, or cable the body of which is composed of a number of twisted truncated sectoral Wires disposed around a common center, with their radial faces abutting, said sectoral wires extending inwardly approximately to the center of the strand, rope, or cable, substantially as described.

3 A wire rope or cablecomposed of a number of strands twisted together, the body of each strand being composed of a number of twisted sectoral wires disposed around a common center, with their radial faces abutting, said wires extending inward approximately to said center, substantially as described.

\VILLIAM HENRY LAIDLER. THOMAS LAIDLER. W itnesses:

I'I. BUKBUH, 3i Southmnpton Buildings, London, IV. C.

WALTER J. SKERTEN, 17 Gracechurch Street, London, E. C. 

